Dual showerhead



FIG. 1 is a perspective view of a dual showerhead showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

The broken line showing in FIGS. 1, 3-6 is included for the purpose of illustrating and forms no part of the claimed design. 

The ornamental design for a dual showerhead, as shown and described. 